It is estimated that there are at least 600,000 black bears in North America, split fairly equally between the United States and Canada.
Picture from Tom Sears
Total black bear population in Canada is between 395,000 and 475,000, an in the United States it is estimated that their population is between 340,000 and 465,000. They inhabit much of their original Canadian range, but no not live in the southern farmlands of Alberta, Saskatchewan or Manitoba. They have been extinct in Prince Edward Island since 1937. In the US, the black bears range is constant throughout the Northeast, northern Midwest, the Rocky Mountain area, west coast and Alaska.